Roller bearing



` Y Y B B-RNANDER Aug. 9, 1932. ROLLER 'BEARING Re. 18,562

Original Filed July 19. 192] /3 /Z Z5 Y Y@ z5 'l' /5 k \/v l l Y,

` Reissued Aug. 9, 1932 UNITED s'ra'rssI PATENT OFFICE WILHELM B. BRONANDER, .OF MONTCLAIR, NEW JERSEY, .ASSIGNOR TO JOSEPH G. DENNY, JR., `OF PHILADELPHIA, PENNSYLVANIA ROLLER BEARING Original No. 1,697,493,y dated January 1, 1929, Serial No. 485,822Q'ii1ed'3uly 19, 1921. Renewed lay 16,

1928. Application forl reissue tiled December 29, 1930. Serial No. 505,432.

This invention relates particularly to bearings'of the type disclosed in my companion Patent No. 1,548,821 wherein the load'is carried by two angularly related series of rollers operating between companion bearing members.

Special objects of the invention are to insure proper spacing of the rollers, to arrange for carrying thrust loads and to accomplish all this in a simple, practical and compact form of bearing.

In the accompanying drawing, wherein I have illustrated a few of the possible embodiments of the invention; these desired results are attained by arranging the rollers of one series in overlapping relation to the rollers of the other series.

In the drawing Fig. 1\is a cross sectional elevation of one form of bearing constructed in accordance with the invention;

Fig. 2 is a similar sectional elevation showing another embodiment of the invention;

Fig. 3 is a sectional elevation of a bearing similar to Fig. 2 but in which both the inner and outer tracks are conical; K

Fig. 4 is a sectional elevation of a bearing similar to that shown in Fi s. 1 and 2 but having a slightly different orm of rollers;

Fig. 5 is a sectional elevation of another form of bearin constructed in accordance with the invention in which the outer track is concaved and the inner track is conical; and

Fig. 6 illustrates in sectional elevation still another embodiment of the invention.

In these views 10 designates the outer bearing member, 11 the inner bearing member, 12 the rollers of one annular series and 13 the rollers of the companion annular series.

The rollers in all the forms shown are of tapered construction andare arranged with their larger ends inward or toward the center of the bearing. Also in the different forms shown the rollers of one series are inclined bodily with respect to the rollers of the other series, the outer and smaller ends of the rollers in each series being inclined inwardly toward the axis of the bearing. Also the taper and the incline of the rollers may be such that lines extending from the outer and inner surfaces of the rollers will converge to the axis of the bearing, as in my prior patent above referred to.

In the first instance shown and in Figs. 2 and 4 the outer bearing member is formed with conical tracks 14 and 15 and the inner bearin member has a convex track 16 forme as the segment of a sphere whose center is located atthe center 17 of the bearing. Also in these views the tapered rollers are adapted to bear at their ends on the outer conical tracks and are adapted to bear at intermediate portions between the ends on the inner convex track.

In the simplest form of the invention shown, Fig. 2, the rollers are of plain,longi tud1nally tapered construction so that they have a full length contact with the outer conical tracks and an intermediate tangential bearin on the inner convex track.

In ig. 4 this construction is varied to the extent of providing the intermediate portions of the rollers with concave annular grooves 18 of approximately the curvature of the inner convex track.

In Fig. 1 the intermediate portions of the rollers are reduced at 19 so as to be entirely free of engagement with the tracks and at the ends of these reduced portions conical .bearing surfaces 2O are provided making tangential contact with the inner convex track. 1

Fig. 3 ditl'ersfrom Fig. 2 only in that the inner member instead of having a convex track has inclined conical tracks 30 and 21 opposed to the outer conical tracks 14 and 15 respectively.

In Fig. 5 the rollers which are of outward- 1y tapering construction bear with their intermedlate portions on the conical' tracks `22,

23 of the inner member and have conical end portions 24 bearing or. the outer concave track 25.

A special feature common to all these constructions yis that the rollers of the two relatively inclined sets are staggered so that the inner ends of the rollers 1n one set stand between and operate as spacers between the inner ends of the rollers in the companion Y eration of the rollers in the other set. Preferably the rollers of the two `sets. overlap only to a relatively slight extent so as to avoid friction as much as possible and they may be positivel spaced in proper relatlon by a retainer suc as indicated at '31.

Another important feature of the invention is the provision of the rollers with bearin surfaces such as I have indicated at 26 in igs. 2, V3 and 4 at their inner ends so arranged that when the rollers of the two sets are assembled, these bearing surfaces at the ends of the rollers in one set will bear on the tracks provided for the rollers ofthe oth-v er set. This cooperative relation enables the rollers to carry thrust loads as will be evident from the views referred to.

justing or self-aligning.

The lstructure shown lin Fig. 6 is similar in a general way to that of Fig. 4, the main differences being that the rollers are shorter, it being found unnecessary in some instances to have the end thrust feature, since the an nular grooves in the intermediate portions of the rollersserve to center the same.

It will be observed that in the forms of the invention embodied in Fi s. 4 and 6, the load is transmitted between t e bearing surface ofthe convex member 11` and the complementary concave surfaces 18 of the rollers and between the straight line end sections o the rollers and the conoidal tracks`14 and 15 lthereby avoiding point transmission of load while permitting-relative rocking axially of the members 10 and 11.

vI claim:

1. In a roller bearing anl inner bearing member having a convexly curved track, an outer bearing member having edge to edge abutting conical tracks both opposed to t e curved track of the first member, a set of rollers `bearing at their opposite ends on one of the conical tracks and at their intermediate portions on the convex track and, a second set of rollers bearin at their ends on the other conical track an at their-intermediate portions on the curved track,'the rollers of the two series standing in overlapping relation at the abutting edges of the two conical tracks.

2. The structure of claim v1 in which the yoverlapping portions of the rollers in each series extend beyond their bearing tracks into rases one of the conical tracks and a second series f of rollers bearing at their opposite ends on the other conical track, both said series of rollers engaging the curved track and whereby the load is carried by the two sets of rollers andthe bearing is self-centering.

4. In a roller bearing, cooperating bearing v members having relatively inclined tracks and two sets of relatively inclined tapered rollers riding on said tracks, one set of rollers being disposed at one side of the longitudinal center of the bea-ring and the other set being disposed at the other side of the center, the inner ends only of the rollers of saidvsets overlapping, the inner ends of the rollers of each set engaging the track of the other set adjacent the lon itudinal center of the bearing, whereby eac track operates as a thrust bearingfor the rollers of the other track.

5. In a roller` bearing, cooperating bearing members having relatively inclined tracks and two sets ofj relativel inclined tapered rollers riding on said trac s and overlapping at'their inner ends only, the inner ends of the rollers of each set engaging .the track oit the other set adjacent the longitudinal center of the bearing, whereby each track operates as a thrust bearing for the rollers of the other track, the outer bearing member having conil cal bearing tracks with the apex disposed centrally thereof and the base of the cone ldisposed nearer the axis of rotation than the apex. v

6. In a roller bearing, cooperating bearing members having'relatively inclined tracks and two sets of relatively inclined tapered bearing rollers riding on said tracks, said rollers bein disposed with their larger ends adjacent t e longitudinal center of the bearing and in overlafping relation, the inner ends of ther rollers o the other set.

7. In a roller bearing, a bearing-member havin reversely inclined conical tracks, a secon bearing member having a convex bearing track having the curvature of a segment of a sphere whose center is located in the axis of rotation of the bearing and opposed to both the conical tracks, a series of tapered rollers bearing at their opposite ends on one of the conical tracks and having concave grooves intermediate their ends substantially conforming with the curvature of and engaging said convex track and a second series of tapered rollers bearing at their opposite ends on the other of the conical tracks and having concave grooves'intermediate their ends substantially conforming with the curvature of and engaging said, convex track.

8. A roller bearing having an outer race- Way having oppositely inclined conoidal surfaces taperlng outwardly toward an apex lietween the ends of said surfaces, an inner raceway having a convex surface opposing said conoidal surfaces, and two annular series of each set engaging the track of lll rollers disposed between said racewa s, said rollers having concave grooves con orming with and engaging said convex surface and straight line sections engaging said conoidal surfaces, no portion of the conoidal 'surfaces engaged b said roller surfaces being Aat a greater ra ial distance than said apex from the axis of rotation of said bearing, andthe concave grooves of the rollers of one of said series being spaced from the concave grooves `of the rollers of the other of said series suiciently to avoid overlapping of the concave grooves of the rollers of one series by the concave grooves of the rollers of the other of said series.

9. A roller bearing having an outer conoi-y dal raceway, an inner convex raceway havingA the curvature of a segment of asphere whose axis is located in the axis of rotation of the bearing, and a series of rollers between said raceways,said rollers each tapering from the apex of said conoidal raceway toward the axis of rotation of the bearing and the smaller Aends of the rollers being nearer to the axis of rotation of the bearing than are the larger ends of the rollers.

11. In a roller bearing, an outer bearin member having opposite y inclined conoida tracks tapering toward an apex between them,

and a convex inner bearing member havin the curvature of a segment of a s here an op osed to both the conoidal trac ,-a plura ity of series of rollers each having tapered conoidal bearin surfaces at each end thereof and an interme iate concave bearin surface between said taperedend surfaces, t e rollers of one of saidseries having their conoidal end sections en agin one of said conoidal tracks and the rol ers o the other of said series having their conoidal sections engaging the other of said conoidal tracks. l

12. In a roller bearin an outer bearin l member having opposite y inclined conoida tracks tapering toward an apex between them, and a convex -inner bea-ring member having the curvature of a segment of a s here and op osed to both the conoidal trac a plulra ity of series of rollers each having tapered conoidal bearing surfaces at each end thereof and an'interme ate concave bearin surface between saidv tapered end surfaces, t e rollers of one of said series having their conoidal end sections engagin one-of said conoidal tracks and the rol ers o the other of said series having their conoidal sections engaging the other of said conoidal tracks, the lai' er ends of the rollers of one of said series being adjacent to the lar cr ends of the other of said series.

13. n a roller bearin an outer bearing member having'opposite y inclined conoidal tracks tapering toward'an apex between them,

and a convex inner bearing member having the curvature of a segment of a s here and opposed to both the conoidal trac s, a plurality of series of rollers each having tapered conoidal bearing surfaces at each end thereof and an intermediate concave bearing surface between said tapered end surf-aces, the rollers of one of said series having their conoidal end sections engaging one of said conoidal tracks and the rollers of the other of-sai'd series having their conoidal sections engaging.

the other of said conoidal tracks, the concave section of the rollers of one of said series being spaced from the concave section of the rollers of the other of said series suiiciently to avoid the overlapping of the concave section of the rollers of one series by the concave section of the rollers of the other series.

Signed at New York in the county of New York and State of New York this 23rd day of December, 1930.

WILHELM B. BRONANDER. 

